-42.16% is the change from 306 to 177
Calculation steps:
[( 177 - 306 ) ÷ 306] x 100 = -42.16%
Formula
Percentage change = [(177 - 306) / 306] x 100
Subtract the new number by the original number
177 - 306 = -129
-129 ÷ 306 = -0.4215686274509804
-0.4215686274509804 x 100 = -42.16%